#include <stdio.h>

void open_some_file(const char *file){
    FILE *f = fopen(file,"r");
    if (NULL != f){
        /* File exists,handle error */
    } else {
        if (fclose(f) == EOF){
            /* Handle error*/
        }
        f = fopen(file,"w");
        if (NULL == f){
            /*Handle error */
        }

        /* Write to file */
        if (fclose(f) == EOF){
            /* Handle error */
        }
    }
}